Lourdes has reportedly revealed that she can "clash" with her mother Madonna when it comes to decisions about their clothing range Material Girl.

The 13-year-old said that although she "likes" her mum's style, there are times when they have completely different opinions.

Lourdes told The New York Times: "Working with my mum is fun, she has great style and I really look up to her style and what she's done and everything, but also there are some points where we really clash in our decision-making."

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Madonna then laughed: "And that's where I go, 'It's time to do your homework!'"